20103331221 has 16 divisors (see below), whose sum is σ = 29833473600. Its totient is φ = 13379378544.

The previous prime is 20103331211. The next prime is 20103331229. The reversal of 20103331221 is 12213330102.

It is not a de Polignac number, because 20103331221 - 2¹⁰ = 20103330197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20103331194 and 20103331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103331229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618366 + ... + 650063.

It is an arithmetic number, because the mean of its divisors is an integer number (1864592100).

Almost surely, 2^20103331221 is an apocalyptic number.

It is an amenable number.

20103331221 is a deficient number, since it is larger than the sum of its proper divisors (9730142379).

20103331221 is a wasteful number, since it uses less digits than its factorization.

20103331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269025 (or 1269019 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20103331221 its reverse (12213330102), we get a palindrome (32316661323).

The spelling of 20103331221 in words is "twenty billion, one hundred three million, three hundred thirty-one thousand, two hundred twenty-one".